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GUNNISON BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -1.4 indicates that the current SURFACE WATER SUPPLY INDEX <br /> • <br /> conditions are below normal but have improved slightly 5 G++rw%Isan Alvr 91s1n <br /> from the previous month. However, drought conditions exist 4_ <br /> in the southern section of the Grand Mesa and in the upper <br /> iu reaches of the Uncompaghre drainage. Although Blue Mesa 3 J �,," 5 r <br /> Reservoir is storing approximately 105% of normal, reservoir 2" ' .. . 1-- , : } : i <br /> storage throughout the rest of the basin has been E E <br /> significantly diminished. The groundwater table has been 1 O _,—.1 -- 1 _ <br /> lowered resulting in diminished flow of natural springs. • _ ^�,/ <br /> Cumulative flow at the key gaging station, Uncompaghre �� <br /> River near Ridgway, is approximately 35% below normal o -s- ti <br /> for the water year but above the minimum flow recorded in -'- , <br /> 1977. -' <br /> JNM1 JM M2 JAN33 .JM194 JAMBS .JANOS JAN07 JANOS JAN39 JANDO JAN91 <br /> MOW YEAR <br /> Outlook: <br /> Water supplies will remain short throughout most of <br /> the basin. Demands for storage releases from Ridgway <br /> Reservoir remains relatively high to satisfy the needs of the <br /> Uncompaghre Valley Water Uses Association. <br /> UNCCMPAHGRE RIVER NR, RIDGWAY <br /> Administrative/Management Concerns: 300 - now UV 11A MAN <br /> Senior water rights have sporadically dried up the :� _le <br /> 170 Uncompaghre River above Ridgeway Reservoir. Streamflow ;3 " <br /> record reveal that the last time the Unconmpaghre River , o — . 7 <br /> didn't flow continuously was in the severe drought of 1977. ' /3 -, <br /> Water district 40 (southside of the Grand Mesa) continues „o <br /> to be under extremely tight administration. 1s <br /> Public Use Impacts: 1 6 <br /> Water-based recreation has been sustained at Blue 40 <br /> 313 <br /> Mesa Reservoir and in the Gunnison River below the - 2° <br /> reservoir. <br /> c t NDv NC Jsn Feb %arch ►poll lay Jiro July Aug S.pt <br /> I.ChRH <br /> O MAX(1994) + MIN(1977) o AVG A 1990 <br /> Gunnison River Basin Reservoir Supplies Gunnison River Basin Reservoir Supplies <br /> 700 Igo <br /> . f//90, <br /> jhj "a- i 70 <br /> .", <br /> +! 400- l <br /> 90 <br /> 1. i <br /> $t, it ts 40_././.\\ <br /> 3 200- 30 <br /> 20 <br /> ,a9- A <br /> 10 <br /> . . „„„ 1-77771 <br /> slue NW Taylor FAX Crawford Fruitland <br /> ® lap.7/31 Contents ® 7/31/90 Contents ® Avg.7/31 Contant9 ® 7/31/90 CORtsllts <br /> 6 <br />